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envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=2607:f8b0:4864:20::1032; envelope-from=mchitale@ventanamicro.com; helo=mail-pj1-x1032.google.com X-Spam_score_int: -6 X-Spam_score: -0.7 X-Spam_bar: / X-Spam_report: (-0.7 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, PDS_HP_HELO_NORDNS=0.659, RCVD_IN_DNSWL_NONE=-0.0001, RDNS_NONE=0.793, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=no autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Mayuresh Chitale , alistair.francis@wdc.com Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: pass (identity @ventanamicro.com) X-ZM-MESSAGEID: 1648034304764100001 Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Accesses to henvcfg, henvcfgh and senvcfg are allowed only if corresponding bit in mstateen0/hstateen0 is enabled. Otherwise an illegal instruction trap is generated. Signed-off-by: Mayuresh Chitale --- target/riscv/csr.c | 82 ++++++++++++++++++++++++++++++++++++++++++---- 1 file changed, 76 insertions(+), 6 deletions(-) diff --git a/target/riscv/csr.c b/target/riscv/csr.c index 215c8ecef1..2388f0226f 100644 --- a/target/riscv/csr.c +++ b/target/riscv/csr.c @@ -39,6 +39,35 @@ void riscv_set_csr_ops(int csrno, riscv_csr_operations *= ops) } =20 /* Predicates */ +static RISCVException smstateen_acc_ok(CPURISCVState *env, int mode, int b= it) +{ + CPUState *cs =3D env_cpu(env); + RISCVCPU *cpu =3D RISCV_CPU(cs); + bool virt =3D riscv_cpu_virt_enabled(env); + + if (!cpu->cfg.ext_smstateen) { + return RISCV_EXCP_NONE; + } + + if (!(env->mstateen[0] & 1UL << bit)) { + return RISCV_EXCP_ILLEGAL_INST; + } + + if (virt) { + if (!(env->hstateen[0] & 1UL << bit)) { + return RISCV_EXCP_VIRT_INSTRUCTION_FAULT; + } + } + + if (mode =3D=3D PRV_U) { + if (!(env->sstateen[0] & 1UL << bit)) { + return RISCV_EXCP_ILLEGAL_INST; + } + } + + return RISCV_EXCP_NONE; +} + static RISCVException fs(CPURISCVState *env, int csrno) { #if !defined(CONFIG_USER_ONLY) @@ -1865,6 +1894,13 @@ static RISCVException write_menvcfgh(CPURISCVState *= env, int csrno, static RISCVException read_senvcfg(CPURISCVState *env, int csrno, target_ulong *val) { + RISCVException ret; + + ret =3D smstateen_acc_ok(env, PRV_S, SMSTATEEN0_HSENVCFG); + if (ret !=3D RISCV_EXCP_NONE) { + return ret; + } + *val =3D env->senvcfg; return RISCV_EXCP_NONE; } @@ -1873,15 +1909,27 @@ static RISCVException write_senvcfg(CPURISCVState *= env, int csrno, target_ulong val) { uint64_t mask =3D SENVCFG_FIOM | SENVCFG_CBIE | SENVCFG_CBCFE | SENVCF= G_CBZE; + RISCVException ret; =20 - env->senvcfg =3D (env->senvcfg & ~mask) | (val & mask); + ret =3D smstateen_acc_ok(env, PRV_S, SMSTATEEN0_HSENVCFG); + if (ret !=3D RISCV_EXCP_NONE) { + return ret; + } =20 + env->senvcfg =3D (env->senvcfg & ~mask) | (val & mask); return RISCV_EXCP_NONE; } =20 static RISCVException read_henvcfg(CPURISCVState *env, int csrno, target_ulong *val) { + RISCVException ret; + + ret =3D smstateen_acc_ok(env, PRV_S, SMSTATEEN0_HSENVCFG); + if (ret !=3D RISCV_EXCP_NONE) { + return ret; + } + *val =3D env->henvcfg; return RISCV_EXCP_NONE; } @@ -1890,6 +1938,12 @@ static RISCVException write_henvcfg(CPURISCVState *e= nv, int csrno, target_ulong val) { uint64_t mask =3D HENVCFG_FIOM | HENVCFG_CBIE | HENVCFG_CBCFE | HENVCF= G_CBZE; + RISCVException ret; + + ret =3D smstateen_acc_ok(env, PRV_S, SMSTATEEN0_HSENVCFG); + if (ret !=3D RISCV_EXCP_NONE) { + return ret; + } =20 if (riscv_cpu_mxl(env) =3D=3D MXL_RV64) { mask |=3D HENVCFG_PBMTE | HENVCFG_STCE; @@ -1903,6 +1957,13 @@ static RISCVException write_henvcfg(CPURISCVState *e= nv, int csrno, static RISCVException read_henvcfgh(CPURISCVState *env, int csrno, target_ulong *val) { + RISCVException ret; + + ret =3D smstateen_acc_ok(env, PRV_S, SMSTATEEN0_HSENVCFG); + if (ret !=3D RISCV_EXCP_NONE) { + return ret; + } + *val =3D env->henvcfg >> 32; return RISCV_EXCP_NONE; } @@ -1912,9 +1973,14 @@ static RISCVException write_henvcfgh(CPURISCVState *= env, int csrno, { uint64_t mask =3D HENVCFG_PBMTE | HENVCFG_STCE; uint64_t valh =3D (uint64_t)val << 32; + RISCVException ret; =20 - env->henvcfg =3D (env->henvcfg & ~mask) | (valh & mask); + ret =3D smstateen_acc_ok(env, PRV_S, SMSTATEEN0_HSENVCFG); + if (ret !=3D RISCV_EXCP_NONE) { + return ret; + } =20 + env->henvcfg =3D (env->henvcfg & ~mask) | (valh & mask); return RISCV_EXCP_NONE; } =20 @@ -1936,7 +2002,8 @@ static RISCVException write_mstateen(CPURISCVState *e= nv, int csrno, target_ulong new_val) { uint64_t *reg; - uint64_t wr_mask =3D 1UL << SMSTATEEN_STATEN; + uint64_t wr_mask =3D (1UL << SMSTATEEN_STATEN) | + (1UL << SMSTATEEN0_HSENVCFG); =20 reg =3D &env->mstateen[csrno - CSR_MSTATEEN0]; write_smstateen(env, reg, wr_mask, new_val); @@ -1957,7 +2024,8 @@ static RISCVException write_mstateenh(CPURISCVState *= env, int csrno, { uint64_t *reg; uint64_t val; - uint64_t wr_mask =3D 1UL << SMSTATEEN_STATEN; + uint64_t wr_mask =3D (1UL << SMSTATEEN_STATEN) | + (1UL << SMSTATEEN0_HSENVCFG); =20 reg =3D &env->mstateen[csrno - CSR_MSTATEEN0H - 0x10]; val =3D (uint64_t)new_val << 32; @@ -1979,7 +2047,8 @@ static RISCVException write_hstateen(CPURISCVState *e= nv, int csrno, target_ulong new_val) { uint64_t *reg; - uint64_t wr_mask =3D 1UL << SMSTATEEN_STATEN; + uint64_t wr_mask =3D (1UL << SMSTATEEN_STATEN) | + (1UL << SMSTATEEN0_HSENVCFG); int index =3D csrno - CSR_HSTATEEN0; =20 reg =3D &env->hstateen[index]; @@ -2002,8 +2071,9 @@ static RISCVException write_hstateenh(CPURISCVState *= env, int csrno, { uint64_t *reg; uint64_t val; - uint64_t wr_mask =3D 1UL << SMSTATEEN_STATEN; int index =3D csrno - CSR_HSTATEEN0H - 0x10; + uint64_t wr_mask =3D (1UL << SMSTATEEN_STATEN) | + (1UL << SMSTATEEN0_HSENVCFG); =20 reg =3D &env->hstateen[index]; val =3D (uint64_t)new_val << 32; --=20 2.17.1